A long time ago, I was in Best Buy and I saw the jet ski level from Crash Bandicoot 3 running on the PS1 demo. I didn't even care about that series but seeing the game running stopped me dead in my tracks. I wasn't leaving the store without it.
That's what I think it when I think of a "graphical showcase". Not resolution, draw distance, of frames per second. If somebody walked into a store and saw a game running on a Wii U demo, what game would make them say. " Holy crap that looks good!"
For me, I own a lot of great WiiU titles and I think Super Mario 3D World is the only one that can do that (Maybe Captain Toad.... but it's Toad and not Mario). The game may not be a technical marvel but it's looks so clean, so pretty, so colorful, and there's so much going on. It will look good ten years from now when the latest and greatest starts to look dated.
